The open Latarjet techniques has benn considered as an effective treatment on anterior shoulder instability.Over the past decade there has been a shift from open to all-arthroscopic technique in many surgeries. The arthroscopic technique may result in less postoperative stiffness and faster rehabilitation. So we hypothesized that the arthroscopic Latarjet techniques would have better clinical and radiographic outcomes than the open Latarjet Techniques on anterior shoulder instability.

Inclusion Criteria:

• age older than 15 years
• Traumatic anterior shoulder instability
• Recurrent instability
• Glenoid defects larger than 25%
• Clinical and radiographic data at pre-operation and follow-up

Exclusion Criteria:

• Younger than 18 years
• Non-traumatic shoulder instability
• Primary episode of instability
• Glenoid defects less than 25%
• Previous surgical procedure Incomplete clinical or radiographic data Combination with rotator cuff tear